Spark-arrester.



No. 863,685. i PATENTED AUG. 20, 1907.

I J. H. WHITE.

SPARK ARRESTER.

PPLIOATION FILED, snPT. 2s. 190e.

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UNITED STATES PATENT OFFIOE.

JOHN H. WHITE, OF RONNEBY,VMINNESOTA, ASSIGNOR OF ONE-HALF TO HENRY M.HUFFMAN, OF FARETINE, MONTANA.

s'PARK-ARRESTER.

Specification of Letters Patent.

Patented Aug. 20, 190'?.

To all whom it may concern:

Be it known that I, JOHN H. WHITE, a citizen of the United States,residing at Ronneby, in the county of Benton and State of Minnesota,have invented certain new and useful Improvements in Spark-Arresters;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention has for its object to provide an improved spark arresterespecially adapted for use in connection with traction engines andlocomotives, and to this end it Consists of the novel devices andcombinations of devices hereinafter described and defined in the claims.

The invention is illustrated in the accompanying drawings wherein likecharacters indicate like parts throughout the several views. p

Referring to the drawings, Figure l is a View in side elevation showingmy improved spark arrester applied to the smoke stack' of a locomotiveor traction engine boiler, said boiler being indicated in diagram. Fig.2 is a view principally in vertical section, with some parts shown infull and some parts broken away, showing the upper portion of the smokestack, said parts being shown on a larger scale than in Fig. I, and Fig.3 is a horizontal section taken on the line .t3 x3 of Fig. l.

The numeral l indicates a boiler, and the numeral 2 the smoke stackthereof. The upper end of the stack 2 is provided with an outwardlydaring hood 3 having at its upper portion a large opening 4 ofapproximately the same diameter as the body'of the stack. Within thehood 3 is an annular upwardly flaring sleeve 5, between the upper edgeof which and the hood 3 a large clearance space is left. Between thesleeve 5 and the surrounding portion of the hood 3 there is formed anannular cnder receptacle 6, from the lower portion of which, at someconvenient point, depends a cinder discharging tube 7 that is suitablysecured to the body of the stack.

Located in the discharge passage 4 of the hood 3 is an inverted conicalcap 8 of reticulate material, such as woven wire screen, havingpreferably a rigid metallic band 9 at its upper edge. To the oppositesides of the band 9 are secured the upper ends of depending rods l0, thelower ends of which are pivotally attached to arms 1I of a rock shaftI2, which rock shaft is mounted in suitable bearings I3 secured on theboiler l. The arms ll and the rock shaft 12 constitute a bell crank. Therock shaft l2 has an upwardly extended arm 14 that is connected by a rodl5 to a latch lever 16. This latch lever 16 is pivoted to and coperateswith a notched latch segment 17, which in turn is rigidly secured on topof the boiler l, preferably near the rear end thereof, so that the saidlever will be within reach of the engineer.

By movements of the lever 16, the reticulate cap 8 may be raised orlowered at will, and may be set in different vertical adjustments. Whenthe said cap is lowered to an extreme position it entirely closes thehood passage 4, except through the perforations of the said hood. Whenthe said cap is thus lowered, cinders and sparks cannot possibly escapefrom the stack, but the smoke will find an easy escape through theperforations of the said cap. The cinders which strike against theconical cap will be deflected laterally into the annular cnderreceptacle (i, and from thence will work their way outward and downwardthrough the tube 7. Of course, if desired, a suitable receptacle may beprovided at the lower end of the tube 7 for catching the cinders, or thelower end of the said tube may be normally closed by means of aremovable plug or stopper. The reticulate plate or perfor-ate cap 8should always be lowered when the lire is being started, or at othertimes when it is extremely important that no cinders or sparks beallowed to escape from the stack through the top thereof. At other timeswhen there is no great tendency to eject sparks or cinders, or when theescape thereof will not do damage, andan extremely strong draft isrequired, the said cap 8 may be raised, as shown in Fig. 2.

The device described, while of small cost, may be easily applied tosmoke stacks, and is efficient for the purposes had in view.

What I claim is:

In combination with a smoke stack 2 provided at its upper end with ahood 3, formed with an upwardly curved outwardly flaring lower portion,and at its top with a circular discharge passage of the same diameter asthe stack 2, the upwardly curved outwardly flaring inner collar portion5 secured within the said hood and coperating with the outwardly flaringlower portion of said hood to form an annular upwardly flaring cnderreceptacle 6, a discharge tube 7 leading downward from said annularreceptacle G, an inverted conical reticulate cap 8 mounted for verticalmovements within said discharge passage 4 and means for raising andlowering the same, substantially as described.

In testimony whereof I afhx my signature in presence of two witnesses.

JOHN H. WHITE.

Witnesses:

W. F. EWERT, R. DAYTON.

